(b) Discuss the silicon crystal as shown in Fig. (a). [2]

(a) Using appropriate symbols, give a balanced chemical reaction to represent each of the following: (i) Regeneration of exhausted Anion exchange resin, (ii) Action of Lime solution on Magnesium Chloride, (iii) General representative structural formula for Zeolite, (iv) Action of Hydrazine on Dissolved oxygen in water.

Write equations that show the processes that describe thefirst, second, and third ionization energies of an aluminumatom. Which process would require the least amount ofenergy?